Emil b



(No Model.)

E.B.PETERSEN.

' HEAT 0R GOLD INDICATOR- Patnted June 7 WITNESSVEIS OAK/26% EMIL 5 rmasm rains ATENT union.

EMIL B. PETERSEN, OF- KEARNY, NElV JERSEY.

HEAT OR COLD HNDICATORJ SPECIFICATION forming part of Letters Patent No.605,129, dated June 7, 1898.

Application filed August 11, 1897.

To aZZ whom it may concern.-

Be it known that I, EMIL B. PETERSEN, a citizen of the United States,residing at Kearny, in the county of Hudson and State of New J ersey,have inven ted certain new'and useful Improvements in Heat or GoldIndicators; and I do hereby declare the following to bea full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to letters ofreference marked thereon which form a part of this specification.

This invention has reference generally to a heat or cold indicator andregulator, and more especially to improvements in devices of thatcharacter provided with an indicating mechanism for announcing anexcessive degree of heat or great cold either by sounding an electricalarm operated by means of a circuitclosing device or by some mechanicalmeans controlled by the indicating apparatus.

The primary object of this invention, therefore, is to provide a simplyconstructed and operative device of this nature which is to be used as atemperature-indicator, and in consequence of a rise in temperature,as inthe case of a fire, by sounding an electric alarm-signal warning theoccupants of the building of the presence of a fire or an excessivedegree of heat. Thedevice is also designed for use in greenhouses,incubators, due, or in factories, where an even temperature is requiredand excessive heat or cold may mean certain destruction, the deviceserving as an automatic indicator to give notice when the temperature isabove or below that required.

Afurther object of this invention is to provide, in connection with thedevice, a suitable adjusting means and indicating-dial for rendering the-deviceadjus'table and set it to a certain number of degrees, at whichcontact is to be made for the purposes intended.

- A further object of the invention is to provide a device of this classwhich'shall be simple in construction, but shall have strength andlightness and shall be adapted to be readily attached to any part of aroom.

The invention therefore consists in the improved heat or cold indicatorand regulator herein set forth and also in such novel ar- Serial No.647,842. (No model.)

rangements and combinations of parts, all of which will be hereinafterfully described, and finally embodied in the clauses of the claim.

The invention is clearly illustrated in the accompanying drawings, inwhich Figure 1 is a front elevation of my novel form of circuit-closingdevice when used as an automatic heat-indicator, and Figs. 2 and 3 areend views of the device. Fig. l is a detail view of certain parts of thedevice when used as a cold-indicator, and Fig 5 is a detail view ofcertain parts of the device when employed for controlling theheat-regulatin g device of an incubator. Fig. 6 is afaee view' of amodified construction of heat-indicator embodying the principles of myinvention, and Fig. 7 is an edge view of the same. Fig. 8 is aperspective view of the respective ends of a connecting-plate employedin connection with the device.

Similar letters of reference are employed in all of the views toindicate corresponding parts.

In said drawings, A indicates the complete contact or circuit-closingdevice, comprising a suitable metallic base a, which is open at one end,as at a, and has the two downwardlyextending sides a and which form alongitudinal channel or chamber (#111 said base, as clearly illustratedin Fig. The other end a of said chamber or channel is closed, as at a,(see Fig. 1,) and has secured thereto a dial a provided with suitablegraduations for indicating degrees of heat and cold. Arranged to slidein a suitable hole or perforation in saidclosed end of the base CL is abar or rod 1), provided in said channel a with a hook end Z), and itsother end 6 being provided with a screw-thread, substantially asillustrated in Fig. 1. On said screw-threaded end of said bar or red Z)is an adj usting-nut 6 which is provided with a suitable index hand orpointer Z), as will be clearly seen from an inspection, of 'Figs. 1 and2. Iivotally ar ranged in the open end a of said base a and on asuitable pin 6 is a'hook-shaped end 0 of an arm 0, provided at its freeend with a button c or other suitable device, made of rubher or anyother desirable non-conducting material. \Vithin said channel or chambera of the base a is a thin strip d of any suitable metal, preferablyzinc, which is provided at coarse one end with an opening cl tor fittingsaid end over the hook I) of the bar or red I), and having at its otherend a suitable opening (Z for placing this on d of the strip (Z inoperative holding contact with the hook-shaped end 0 of the pivot-arm c.Said bar a is also provided with a suitable post or holding-piece ahaving screw-holes a for securely attaching the apparatus in anydesirable position to the wall or ceiling of a room. On said post orholding-piece a are a pair of contact-posts f and f, which are suitablyinsulated from said piece a by a piece of non-conducting material fwhich is secured on said piece by the said contact-posts f and f.Connected with said posts are the ends 9 and g of the electric-circuitwires, as clearly indicated in dotted outline in Figs. 1 and 3. Held ina fixed position on the post f is a contact-arm f, provided with aflattened end f and fulcrunied on a pivot or screw on anupwardly-extending post or bracketf", operativel y connected with thecontact-post f, is a second contact-arm f", having a contact-point, as fat the one end and a Hat surface, as f, at the other end. In constantand normal holding contact with said flattened end f of the contact-armf is the herein-described insulating-button e of said arm 0, the weightof said arm (2 being such that its normal tendency is to keep theconneeting plate or strip (Z taut and under its proper tension at alltimes and at the same time remain in operative holding engagement withsaid end of the arm f. Thus it will be evident that as the temperaturerises said strip (Z will expand, which permits the heavy arm 0 to swingin a downward direction on its pivotal support and at the same timeexert a greater pressure on the portion of the arm f, which naturallycauses said arm to rise until its point] makes contact with. the part1"" of the arm f". At once a completed electric circuit is establishedthrough said arms f and f, the postsf andf, and the wires g and g, andan alarm-bell in said circuit gives the danger-signal. As soon as thetempera ture again falls below the danger-point the strip (Z is againcontracted, which draws the arm c in an upward direction, and theelectrical contact between the arms and f will at once become broken.

It will be evident that by turning a screw or nut l) in either directionthe tension on the strip (Z can be increased or decreased, which variesthe position of the arm 0 and brings the contact-pointf of the arm f,under normal conditions of the temperature, either closer to or fartheraway from the part f ol' the contact-arm f as will be clearlyunderstood. It will be seen that contact can be established at anydesired degree of temperature-as, for instance, if the index-hand l)"indicates to the graduation on the dial a it means that the device hasbeen adjusted to make an electrical contact between the arms f and fwhen the temperature in the room has risen to 00.

When it is desired to use the apparatus as a cold-indicator, the button0 on the arm 0 is reversed and the two arms f" and f arranged inopposite direction from that shown in Fig. 1, as will be evident from aninspection oi Fig. 1-. Thus it will be seen that when the strip (1contracts the arm 0 is drawn in an upward direction, whereby said buttona pushes against the part f on the arm and causes the latter to makeelectrical contact with the arm f in the manner as hereinabovedescribed.

.Vhen the apparatus is to be used in connection with the valve mechanism7L of an incubator, I dispense with the use of the arms f and f andconnect the end 0 of the arm 13 with a rod 7L to operate a lever 71?,which in turn opens the valve mechanism 72 as the strip (1 expands whenthe heat in the incubator is too great. Of course it will be understoodthat when used in connection with an incubator said strip (Z must extenddirectly into the inner compartment of the incubator to be subjected tothe action ol the heat therein.

In Figs. (3 and 7 I have illustrated the device when used as atemperature-indicator. In this construction the end of the arm c isprovided with a toothed segment 0', which is in operative mesh with apinion 'II and indexhand i of a graduated plate 1 Thus it will beevident that as the strip (1 expands or contracts and the lever-arm c islowered or raised, in the mannerhercinabove stated, said pinion and itsindex-hand are moved to indicate the degrees of temperature in the room.Said pinion 1" may be insulated from the body ol the dial-plated and theindex-hand connecteifl with a circuit-wire i ()n the edge of said platei may be arranged an adjustable contact-post 1', having the other end ofthe circult-wire connected therewith. As soon as the temperature risesto a degree, according to the adjustment of; said post I? on said plate6, and the pointer or index-hand caused to come in contact with. said.post a emnplete electrical circuit will be established and the devicecan be used as an indicator of too great a degree or of too low atemperature.

The operation of the several parts ol the device are very simple andeffective for the many purposes for which it is intended.

I am aware that many changes may be made in the several arrangements andcombinations of parts, as well as in the details of coi'istruction,without departing from the scope of my present invention. ll'ence I donot limit mysellto the exact arran gements and combinations of partsherein showmand illnstrated in the accompanying drawin ll'aving thusdescribed my invention, what I claim is- 1. In aheat or cold indicator,the combination, with an indicating meehanism,ol.' a baseplate,alongitudinal chan nel or chamber the re in, a metallic strip in saidchannel or chanr ber, secured at one end to said base, and a TOS pivotedlever on said base, with which the other end of said strip is connected,and said lever being adapted to actuate said indicating mechanism.

2. In a heat or cold indicator, the combination,with an indicatingmechanism, of a channeled base-plate a, a tension device at one end ofsaid base, a pivoted lever at the opposite end of said base, and a stripsupported at its ends by said tension device and said lever, said leverbeing adapted to actuate said indicating mechanism, substantially as andfor the purposes set forth.

3. In a heat or cold indicator, the combinati0n,\vith an indicatingmechanism, of a channeled base-plate a, a tension device at one end ofsaid base, consisting, essentially, of a hook-shaped rod 1) and anadjusting screw or nut thereon, a pivoted lever c at the opposite end ofsaid base, having a hook-shaped end 0, and a strip supported at its endsby said hook-shaped rod Z) and the hook end of said lever c, said leverbeing adapted to actuate said indicating mechanism, substantially as andfor the purposes set forth.

4. In a heat or cold indicator, in combination, with a base, having alongitudinal channel or chamber therein, a metallic strip in saidchannel or chamber, secured at one end to said base, a pivoted lever onsaid base, with which the other end of said strip is connected, and anelectrical-contact device, adapted to be actuated by said lever,substantially as and for the purposes set forth.

5. In a heat or cold indicator, in combination, with a base, having alongitudinal channel or chamber therein, a metallic strip in saidchannel or chamber, secured at one end to said base, a pivoted lever onsaid base, with which the other end of said strip is connected, and anelectrical-contact device,consisting, essentially, of a fixedcontact-arm f and a pivoted contact-arm f adapted to be engaged by theend of said lever, to cause said arms to make electrical contact,substantially as and for the purposes set forth.

(3. In a heat or cold indicator, in combination, with a base, anindex-dial, a metallic strip, secured at one end to said base, a pivotedlever on said base, a tension device on said base, a strip supported atits ends by said tension device and said lever, and anelectrical-contact device, adapted to be actuated by said lever,substantially as and for the purposes set forth.

7. In a heat or cold indicator, in combination, with a channeled base,an index-dial, and a tension device at one end of said base, a pivotedlever at the other end of said base, a strip supported at its ends bysaid tension device and said lever, and an electrical-contact device,consisting, essentially, of a fixed contact-arm f and a pivotedcontact-arm f adapted to be engaged by the end of said lever, to causesaid arms to make electrical c011- tact, substantially as and for thepurposes set forth.

8. In a heat or cold indicator, in combina tion, with a channeled base,an index-dial and a tension device at one end of said base, consistingof a hook-shaped rod 1) and an adjusting screw or nut thereon, a pivotedlever c at the opposite end of said base, having a hook end 0, a stripsupported at its ends by said hook-shaped rod 1) and the hook end ofsaid lever c, and an electrical-contact device, adapted to be actuatedby said lever substantially as and for the purposes set forth.

9. In a heat or cold indicator, in combination, with a channeled base,an index-dial and a tension device at one end of said base, consistingof a hook-shaped rod 1) and an adjusting screw or nut thereon, a pivotedlever c at the opposite end of said base, having a hook end 0, a stripsupported at its ends by said hook-shaped rod 1) and the hook end ofsaid lever c, and an electrical-contact device consisting, essentially,of a fixed contact-arm f and a pivoted contact-arm f adapted to beengaged by the end of said lever, to cause said arms to make electricalcontact,substantially as and for the purposes set forth.

In testimony that I claim the invention set forth above I have hereuntoset my hand this "6th day of August, 1897.

EMIL B. PETERSEN.

IVitnesses:

FREDK. O. FRAENTZEL, WM. 11. CAMFIELD, Jr.

